The unparalleled talent of the country started from Harbin Institute of Technology

Chapter 124, Textbook Compilation, Linear Algebra and Analytic Geometry, Final Exam, and the Active Liu Xiaoli

Just do it!

As a 23-year-old young man, Wang Duoyu didn't have so many concerns and just did it first.

The textbooks for aerospace majors cover many aspects, and to be honest, the textbooks from the 1970s were still lecture notes produced by scientists such as Qian Xuesen.

It's too advanced and not systematic enough.

What Wang Duoyu wants is teaching materials about aerospace, from the basics to the advanced, step by step.

So he knocked on the door of the principal's office.

Liu Deben was not in the office, but in the secretary's office, talking to Li Rui.

Han Jue brought Wang Duoyu to the secretary's office: "Secretary Li, Principal Liu, Wang Duoyu is looking for you."

As the director of the president's office of Harbin Institute of Technology, Han Jue's position is not low, but now he has become a marginal figure.

"Oh, Mr. Wang, what can I do for you?"

After the pleasantries, Li Rui asked with a kind smile.

Wang Duoyu nodded and stated his thoughts directly, and then the office fell into extreme silence.

Li Rui, Liu Deben, and Han Jue all stared at Wang Duoyu in amazement, their expressions as shocked as they could be.

Wow, Wang Duoyu actually said that he wanted to write the textbooks for the aerospace major himself, and hoped that Secretary Li and Principal Liu could help him find basic lecture notes and textbooks on aerospace.

How can writing textbooks be easy?

"Duoyu, are you taking this matter too simply?"

After realizing what was happening, Liu Deben immediately said seriously:

"If you want to compile a textbook on computational mathematics, then no problem. I will definitely support you."

"But would you reconsider the aerospace textbooks?"

Wang Duoyu heard this and shook his head and explained:

"Principal Liu, my mind is now very clear, and I know what I am doing."

"The reason I wanted to compile the textbook wasn't for others, but for myself. The textbooks I had previously received from Director Ma were basically useless. Although they were very advanced, they were mostly just lecture notes."

"In my opinion, aerospace majors involve fields such as solid mechanics, fluid mechanics, aerospace dynamics, celestial mechanics, thermodynamics, navigation, avionics, automatic control, mechanical engineering, communications engineering, materials science, and manufacturing."

"The most fundamental areas should be mathematics, or more precisely, linear algebra, spatial analytic geometry, and engineering mathematics."

Li Rui and Liu Deben stared at Wang Duoyu with their eyes wide open, stunned. They both wondered in their hearts: Does Wang Duoyu really understand aerospace?

In fact, the two parents were not quite clear about what kind of talents were needed in the aerospace field, nor did they know how to train them, but through textbooks and handouts, they were able to get a general idea.

When Harbin Institute of Technology was still in existence, the textbooks for aerospace majors were nothing more than the same few.

The three major categories mentioned by Wang Duoyu, such as linear algebra, are among them.

Wang Duoyu is very strong in the field of mathematics. Before New Year's Day, the Langlands concept he mentioned during his communication with Chen Xingshen and others has already preliminarily demonstrated that the three relatively independently developed branches of mathematics, number theory, algebraic geometry, and group representation theory, are actually closely related.

Therefore, there will be no problem at all if Wang Duoyu is asked to complete the three major categories of textbooks: linear algebra, spatial analytic geometry, and engineering mathematics.

However, if we add other fields such as mechanics, navigation, and automatic control, Wang Duoyu will definitely not be able to do it, right?
Han Jue was in a daze. He used to think that Wang Duoyu was a math genius, so it was inevitable that he was arrogant.

But now he feels that he is still too conservative. Wang Duoyu is not proud, but arrogant.

From mathematics to aerospace, is this a simple cross-disciplinary move?

And he actually has to compile teaching materials?
It's just a wild idea, whatever comes to mind is what it is.

However, Wang Duoyu couldn't care less about what others thought. He just proposed what he would do next. If Secretary Li and Principal Liu didn't support him, that didn't matter. He could write a letter to Beijing for help.

When Li Rui and Liu Deben heard that Wang Duoyu was looking for Professor Tao Fangqi from the Institute of Mathematics, their eyelids twitched wildly.

"Duoyu, don't be anxious. We didn't say we didn't support you. It's just that this will definitely take time. I think you should reconsider it."

Liu Deben hurriedly persuaded earnestly:
"April is almost here, and you'll be giving an academic presentation at Peking University. You should take advantage of this time to prepare more."

"At worst, you can continue to delve deeper into mathematics. Didn't Director Hua say before that there are still many problems with prime numbers?"

"Mathematics is what you're best at, but compiling textbooks is hard, tiring, and thankless."

In Liu Deben's opinion, Wang Duoyu is still so young and there is no need for him to be so busy compiling teaching materials.

Not to mention the textbooks for aerospace majors.

Wang Duoyu heard this and shook his head:

"President Liu, I have my own plans for the academic conference, and I will definitely not bring shame to Harbin Institute of Technology."

"I will also find time to write mathematics papers, but I must continue compiling aerospace textbooks."

He has no way to lead a project alone now, and compiling textbooks is a way to test the waters of leading a project independently. Why not give it a try?

If he told Li Rui, Liu Deben and others now that he wanted to start a project and asked Harbin Institute of Technology to approve the R&D funds quickly, he would definitely be rejected.

But compiling teaching materials is much simpler.

For Wang Duoyu, compiling mathematics textbooks is as easy as drinking water and eating. No one knows as many textbooks in the fields of mechanical engineering, avionics, communications engineering, materials science and manufacturing, mechanics, etc. as he does.

In short, for now, he has to compile aerospace professional textbooks, and even Jesus cannot stop him.

Li Rui glanced at Liu Deben, who shook his head slightly.

Both patriarchs are in a dilemma. What should they do?
Han Jue had become invisible at this moment and had no right to speak at all.

"Secretary Li, Principal Liu, I'm sorry to bother you. I will be writing three textbooks on linear algebra, spatial analytic geometry, and engineering mathematics before winter vacation."

"Regarding textbooks on mechanical design and descriptive geometry, we can only wait until after the Spring Festival."

Wang Duoyu spoke again.

He had read the book "Introduction to Interstellar Navigation" written by Qian Xuesen in the early 1960s. This is a basic textbook for aerospace majors, but it only briefly describes various aspects of interstellar navigation technology.

For example, the power system of the launch vehicle, the design and manufacturing process of the rocket, the flight trajectory of the spacecraft, the design principles of the control system, etc.

This is an excellent textbook, but Wang Duoyu feels that there can be better textbooks.

In the office of the president of Harbin Institute of Technology, Han Jue held a meeting. From now on, Harbin Institute of Technology will purchase more teaching materials and books related to the aerospace major, both domestically and internationally!
"Director Han, didn't we just purchase books on this subject? Why do we need to continue purchasing?"

Upon hearing this order, clerk Fang Guizhen couldn't help but frown and asked.

Although Harbin Institute of Technology has added two new majors, aerospace and missiles, it is a good thing for Harbin Institute of Technology.

But for ordinary teachers like Fang Guizhen, it is a matter of running around.

Purchasing teaching materials may seem like a lucrative job, but in fact, it is not that simple at all.

First of all, the review of the textbooks is not decided by Fang Guizhen and others. They just collect a lot of information and then give it to the school professors for review. After confirming the list, they hand it over to leaders such as Liu Deben for approval.

Secondly, the specific number of textbooks required is entirely determined by the school leaders.

Fang Guizhen and the other minions were running themselves to death and were extremely busy.

"Where do all these questions come from?"

Han Jue glared at the other party and shouted sternly:

"Hurry up and get to work. Contact colleagues in Beijing, Shanghai, and other places. Ask them to send all the relevant materials as soon as possible. We don't need so much this time."

He had just come out of the secretary's office. The two patriarchs, Li Rui and Liu Deben, had already told him to cooperate with Wang Duoyu's work without any compromise.

Therefore, as far as this matter is concerned, Han Jue has no right to say no at all.

Not only can you not say no, you also need to complete the work well.

Otherwise, Li Rui and Liu Deben would definitely come to cause trouble for him later.

While Han Jue was helping to solve the problem of auxiliary materials for textbooks, Wang Duoyu was busy compiling several textbooks on linear algebra.

The linear algebra in the aerospace major is quite different from the advanced algebra in the computational mathematics department.

As the saying goes, linear algebra in mathematics is a discipline that studies linear mappings between linear spaces and linear transformations on them.

For aerospace majors or engineering disciplines, research is mostly in low-dimensional space (four dimensions and below), which is actually inextricably linked to low-dimensional geometric intuition.

In a sense, there is actually no problem in combining linear algebra with analytic geometry.

Because geometry is to serve multivariate calculus!

"Standard engineering linear algebra generally consists of six major sections: determinants, matrices, vector systems, systems of linear equations, eigenvalues ​​and eigenvectors, and quadratic forms."

Wang Duoyu was writing on the manuscript paper. In his previous life, when he was an undergraduate at Beijing University of Technology, his major was automation, and among his advanced mathematics, he had studied a course called linear algebra for engineering.

Linear algebra from the perspective of engineering and advanced algebra from the perspective of mathematics are completely different things.

In his previous life, the reason why he switched to mathematics when he was studying for a doctorate was because he wanted to study deeper mathematics. It was also because after graduating from undergraduate school, he discovered many of his shortcomings in his work, so he thought about continuing to take the postgraduate entrance examination and study for a doctorate.

"Teacher Wang, what have you been busy with recently? I don't think you're writing your thesis anymore."

That afternoon, when Wang Duoyu was writing about quadratic forms, Yang Xiuhua came over with a smile.

The other teachers in the office all looked over.

Most of the time, Wang Duoyu is the only one who stays in the office every day, while other teachers have their own things to do.

Especially now that it is the final exam period, everyone is very busy, either setting questions or grading papers.

The title of teacher was not because of what Wu Congqin had said before, but because Su Zhenghuai and others often asked Wang Duoyu questions, so they consciously changed the title.

Although Wang Duoyu is still a college student, no one really regards him as a student.

"Compilation of teaching materials!" Wang Duoyu said concisely.

"Oh, that's great. I don't think quadratic forms are something we need to learn in the mathematics major. Hey, is this a textbook for the automation major?"

After just a few glances, Yang Xiuhua quickly saw the clues and frowned, asking, "Compiling textbooks? Shouldn't they be compiling textbooks for the Department of Computational Mathematics?"

Shao Zongjian, Su Zhenghuai and others also came over and, after obtaining Wang Duoyu's consent, picked up some of the materials on vector space and other materials that he had compiled previously.

Wang Duoyu can compile linear algebra, analytic geometry and engineering mathematics with his eyes closed, and does not need any teaching materials.

When Yang Xiuhua and the others saw the materials he had compiled and looked through them, they couldn't help but exclaim in amazement.

Quadratic forms are the last part of general linear algebra textbooks, and are generally used in control fields, convex optimization, probability statistics, etc.

In addition, from the perspective of linear algebra, quadratic forms also give an example of geometry in simple vector space.

It can be said to be derived from quadratic functions. Although it can be understood using the three-dimensional Euclidean space in real life, it is actually only studied using linear algebra methods, that is, matrices. This part is also very geometric.

Of course, linear algebra is the study of linear spaces. What does this have to do with vector spaces?

Linear space and vector space can actually be confused with each other. Linear space is actually a further abstraction of vector space.

Simply put, the elements in the vector space can be called vectors. After further abstraction, the elements of the linear space are not necessarily vectors in the traditional sense. For example, the Hilbert space is a function.

Functions act as elements in Hilbert space, which are 'vectors' or points.

In calculus, differentiation and integration operations can also satisfy linear properties and the definition of linear space. These functions can constitute a linear space.

This is the difference between advanced algebra in the field of pure mathematics and engineering algebra. Yang Xiuhua and others can easily understand it.

"Well, this is indeed not a textbook for our computational mathematics department, but a textbook for the aerospace major."

After a pause, Wang Duoyu continued:

"I've recently been studying aerospace and have discovered many shortcomings. I originally wanted to learn more, but I found that compiling teaching materials might help me learn faster and better."

Su Zhenghuai, Shao Zongjian, Yang Xiuhua and others: "."

Everyone looked at Wang Duoyu with resentment: We know you are strong, but you don’t have to say it out loud to hurt us, right?
"Are the final exams over yet?"

Seeing that they didn't say anything, Wang Duoyu smiled and changed the subject.

When talking about the final exam, Su Zhenghuai and his friends immediately started chatting happily.

For them, the final exams are indeed over, and the only course left should be ideological and political education.

"Teacher Wang, do you want to see your classmates' test scores?"

At Bingcheng Railway Station, Wang Duoyu sat in the car, holding a book and reading silently.

This book was delivered to the Computational Mathematics Department office by President Liu yesterday. To be more precise, it is a textbook about aerospace.

The book "On Systems Engineering" is a textbook compiled by Qian Xuesen not long ago, which elaborates on the basic theories and methods of systems engineering.

Han Jue and his team tried their best to find dozens of books, but they couldn't find any more.

Wang Duoyu really wanted books on aircraft system design, wing design applications, aircraft optimization design theory, flight mechanics and flight control, but there were none.

Not to mention such professional books, even the handouts are not available.

So Wang Duoyu proposed to Principal Liu Deben and others that they hope to talk to the army and collect some information about the world's missiles and aerospace engines.

I believe the troops will definitely have no shortage of these materials.

why?
Because the army definitely has a lot of intelligence in this area, Wang Duoyu wants to see information related to these aspects, and then compile a book like this, a complete encyclopedia of aircraft and missiles.

It’s just a classification and summary!
Han Jue, Fang Guizhen and other office members hated him for his request.

Because it’s too troublesome!

Wang Duoyu did not rely too much on them, but called Lin Dehong himself and asked the latter to help collect relevant information.

Lin Dehong was quite surprised. After all, many missiles, aircraft and other things are now secret weapons of various countries. How could they be well known?

At that time, Wang Duoyu said to the other party, "Leader, it is precisely because we don't know that we should compile such books to let more people know about this."

"If even our college students don't understand this basic common sense, how can we talk about other things? Perhaps some of our young geniuses will develop a strong interest in aerospace, missiles and other areas because of such common sense books."

So Lin Dehong agreed to help.

However, Lin Dehong also made a request, asking him to take time to visit the army after the Spring Festival.

The specific details were not mentioned, and Wang Duoyu did not ask in detail.

Today is January 21st. According to the telegram Liu Xiaoli sent earlier, she should arrive at Bingcheng Railway Station this afternoon.

But it was obvious that Wang Duoyu was still on the train, which proved that her train was delayed, and it seemed that it was delayed for several hours.

It is absolutely normal for trains to be late in this era.

On the contrary, if it is not late, it would be a matter of luck.

This time, Wang Duoyu borrowed the car from Principal Liu to pick up Liu Xiaoli, but did not lend the person.

Anyway, he can drive, so as long as the car doesn't break down, there will be no problem.

It was indeed a bit cold sitting in the car. Even though Wang Duoyu was wearing a large military coat, he still felt cold after a long time.

The main reason is that his feet sweat and his socks are not breathable. After sweating, if there is no brazier to warm them, he will of course feel cold.

Three and a half hours later, Wang Duoyu had finished reading the book "On Systems Engineering", but Liu Xiaoli had not arrived yet.

"Fortunately, I brought two extra books, otherwise, I would be bored to death."

He went to the exit of the train station again, asked the station staff, and confirmed that Liu Xiaoli's train had not arrived yet, and then came back to continue reading.

More than fifty minutes later, Liu Xiaoli finally left the station.

Looking at the huge crowd, Wang Duoyu spotted Liu Xiaoli at a glance.

The latter did not reveal his entire face, but only his eyes and forehead. Wang Duoyu still recognized him at a glance.

A beautiful woman who is naturally beautiful is of course very easy to recognize.

"Wait a long time?"

Liu Xiaoli put down her scarf, narrowed her eyes into slits, and her eyes were full of Wang Duoyu. The slightly raised corners of her mouth were enough to show that she was very happy at the moment.

"It doesn't take long, just the time it takes to read a book."

Wang Duoyu smiled as he helped her take the luggage and asked her to get in the car.

As soon as she got in the car, she couldn't help but come over and kiss him on the face.

The last time we met was in November, more than two months ago.

Their current relationship is more than friendship but less than lovers, so Liu Xiaoli is naturally impatient and wants to break this window paper.

But reality is reality after all. Every time Liu Xiaoli heard Wang Duoyu mention those jobs, she felt inferior.

She is just a dancer. Although her family is well-off, it is not comparable to Wang Duoyu's family.

But Wang Duoyu’s own strength is the reason why Liu Xiaoli feels inferior.

The People's Daily has already reported his story. Although Liu Xiaoli doesn't know much about mathematics, she knows how much weight the report by the People's Daily carries.

"Should we go eat first or take you home to wash up first?"

"No need to wash up, let's go eat first, and then go back to your school dormitory."

"Ok?"

Wang Duoyu, who was holding the steering wheel, couldn't help but look at the other person strangely when he heard the words, but he saw that she turned her face away and looked out the window as if nothing had happened.

If Liu Xiaoli took off her hat, her red ears would be visible now.

"it is good!"

So Wang Duoyu drove to a state-owned restaurant near the school and ordered three dishes. Needless to say, he didn't finish them.

Fortunately, Wang Duoyu brought a lunch box, otherwise he would not have been able to pack it up and take it away.

In this day and age, if you want to take away food, you have to bring your own lunch box. Otherwise, you can only eat before leaving.

However, few people would order so many dishes when they go out to eat.

Even if you order too much food, you can generally finish it.

Wang Duoyu didn't expect that Liu Xiaoli was not so hungry because she had eaten in the dining car of the train.

After all, the train is late, and who knows when it will arrive at the station.

The car slowly stopped under the teachers' dormitory building. After Wang Duoyu took down the luggage, he took her back to the dormitory first.

"Is your house a mess? Or did you clean it specially because I'm back?"

Before reaching home, Liu Xiaoli laughed jokingly to ease the tension.

Although the two had been alone together before, and that was in her own home, and they had also had the experience of being alone in a room in Jiangcheng, it was different from this time.

The current situation is that their relationship has become closer, and if he wants it, Liu Xiaoli doesn't know whether she should give it to him.

"You'll know if you come in and take a look." Wang Duoyu smiled, opened the door and went in first.

The room looked very clean, but there was still dust in some places that were not often touched, which meant that he had not done a thorough cleaning before Liu Xiaoli came back.

Although it is not a dirty and messy environment, this clean and tidy home looks very scholarly. This is the home Liu Xiaoli likes, and it also fits her fantasy of Wang Duoyu, a college student.

"This is your reward!"

After the visit, Liu Xiaoli suddenly kissed Wang Duoyu on the mouth.

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(End of this chapter)